Power press for perforated articles



POWER PRESS FOR PERFORATED ARTICLES All@ 26, 1941- F. M. MILLER ET AL 2,254,107

' POWER PRESS FOR PERFORATED ARTICLES Filed March 1o, 193e '4 sheets-sheet 2 Aug. 26, 1941. F. M. MILLER ET AL POWER PRESS FOR PERFORATED `ARTICLES 4 Sheets-Sheet 3 Filed March 10, 1938 /M/fA/rams @ed /17/*7 /4/ fuga/C65 Aug. 26, 1941. F. M. MILLER ET Al. y 2,254,107

POWER PRESS FOR ERFORATED ARTICLES Filed March lO, 1938 4 Sheets-Sheet 4 Patented Aug. 26, 1941 Pownrt mess Fon PERFORATED ARTICLES Fred M. Miller, Bala-Cynwyd, Alfred C. Shape, Upper Darby, and Harry S. Walker, Norwood, Pa., assignors to'General Refractories Company, Philadelphiada., a corporation ofPenn- Sylvania Application March 10, 1938, Serial No. 195,056

4 Claims.

Our invention relates to power-operated presses Vfor making perforated articles such as refractory bricks or shapes.

More specifically, our invention comprises a toggle-operated, power-driven press having aY mold-box, and upper and lower plungers co-operating .with said mold-box, said upper plunger having openings therein through which the material from the perforations in the brick or shape may be extruded, these openings being controlled by a valve or like member. The lower plunger is provided with piercers passing therethrough which form the perforations in the brick or shape and which are operated in timed relation with the plungers.

For a further exposition -of our invention, ref` erence may be hadto the annexed drawings and specification, at the end thereof our invention will be specifically pointed out and claimed.

In the drawings:

Fig. 1 is a front view of our device with parts shown in vertical cross-section andparts omitted for the sake of clarity and simplicity.

Fig. 2 is a side view of our device with parts shown in vertical cross-section and parts omittedV for simplicity and clarity.

Fig. 3 is a vertical cross-section through the upper plunger as viewed from the front as in Fig. 1.

Fig. 4 is a front elevation of the upper plunger.

Fig. 5 is a side elevation of the upper plunger.

Fig. 6 is a horizontal cross-section on line 6--6 of Fig. 5.

Fig. 7 is a plan view of the bottom plunger.

Fig. 8 is a vertical cross-section on line 8-8 of Fig. 7 which is on a plane parallel to the plane of Fig. 2.

Fig. 9 is a perspective View of one type of brick or shape which can be made on our machine.

In that embodiment of our invention chosen from among others for illustration in the drawings and description in the specification, our device is shown as consisting of a frame I0 on which the stationary parts of the machine are mounted. Power is applied to the machine by means of driving-shaft II which drives intermediate shaft I2 by means not shown in the drawings. Pinion I3, on intermediate shaft l2, drives main gear I4 to which crank-shaft I5 is connected and whereby it is driven in consequence. Crank-shaft I5 carries connecting rods shaft I8 by means of caps I9. Fig. 1 shows that the intermediate portions of toggle-shaft I8 pass through holes inthe upper portion of the U- shaped, lower toggle 20. Lower toggle 20 carries at its lower end lower toggle-shaft 2| to whichI upper cross-head 22 is connected which, in turn, carries upper plunger 23 to be hereinafter more fully described. Fig. 1 also shows that the outer portions of central toggle-shaft I8 are received in holes in the lower portion of U-shaped, upper.

toggle 24, to which is secured upper toggle-shaft 25 which, in turn, is attached to side bars 26. Side bars 26 carry at their lower ends lower cross-head 2l. Lower cross-head 2l. carries lower plunger 28 thereon which will be hereinafter more fully described. Intermediate upper crosshead 22 and lower cross-head 2l, frame I0 carries mold-box beams 29 in which one or more hollow mold-boxes '30 may be mounted so as to receive the operative portions of upper plunger 23 and lower plunger 28 therein.

Main gear I4 carries a cam having a groove 3| therein in which travels cam-follower 32 carried by cam lever 33 which is connected to pivotshaft 34 which also carries side rod arms 35 thereon. Arms 35 have their outer ends pierced or forked in the v vertical direction and have their sides bored with a plurality of holes 36 which receive pins 3'I`by'means of which side bars 38 are attached to side bar arms 35. Bearings 39, mounted on frame I0, serve toguide side bars 38. At their lower ends, side bars 38 carry piercer cross-head 4D to which are connected columns 4I which pass through bottom crosshead 21 and which support cap plate 42 thereon. To cap plate 42 are attached piercers 43 which, as is seen in Figs. 1 and 2, have a notch 44 adjacent their lower ends so as to be attached to cap plate 42 by means of hold-down plate 45 or in any other convenient manner. Piercers 43 pass through openings in lower plunger 2B, form the perforations in the brick or shape S, and at the upper end of their strokes enter perforations in upper plunger 23 so as to extrude the material from the perforations in the brick or shapeS through openings in the upper plunger. Piercers Y43 have their upper ends sloped or beveled to an edgeso as to more readily pass through the perforations in the bricks or shapes S. These edges may, if desired, be offset somewhat from the centers of the piercers, and the inner piercers may be of slightly greater length than the outer piercers, as seen in Fig. 1.

The bricks or shapes S to be operated on by the press are fed to the mold-box 38 between upper plunger 23 and lower plunger 28 by a mechanism including shaft 46, which is driven in any convenient manner from shaft l5. Shaft 46 carries feed arm 41 keyed thereto. Arm 41 is pivotally connected at one end to feed rod 48 which, in turn, is pivotally connected to feeder 49 which presses at an appropriate time during the cycle of operations against a brick or shape S on the upper surface of mold-box beams 29. The forward face of the on-coming brick or shape S presses the preceding brick or shape out of the press and immediately thereafter drops into mold-box 30 in place for operation.

Figs. 3-6 show upper plunger 23 in greater detail. Upper plunger 23 has, at its lower end, outline walls 233 adapted to co-operate with the walls of mold-box 3B. The lower or operating face 23| of the plunger has a series of perforations 232 therein which receive the upper ends of piercers 43 at the upper end of the piercing stroke. The intermediate portion of plunger 23 is provided with a guide 233 which directs the material extruded from the perforations in the brick or shape S toward openings 234 formed in the sides of plunger 23. Openings 234 are controlled by valves 235 which are substantially duplicates and which have openings 236 therethrough and bent ends 231 whereby they may be adjusted. Valves 235 have their lower faces 238 serrated so as to be held in adjusted positions on corresponding serrated faces 239 on side bars 24D. Wedges 24| stress'against the upper faces of valves 235 so as to push the serrated edges 238 and 239 firmly into engagement. Wedges 24| have tails 242 through which pass bolts 243 which carry nuts 244 to rigidly hold the wedges 24| in position.

having on its upper face arr accommodation frame 21| whose inner surface is slotted or notched to receive keys 212 therein. Keys 212 enter slots 23|] in bottom plunger 2B and thereby connect bottom plunger 28 to bottom cross-head 21. Bottom plunger 28 is formed at its operative face with a hard die 28| mounted on a soft plate 282 which, in turn, is mounted on plunger table 283 by means of bolts 284 or the like. Rivets or bolts 285 serve to connect hard plate 28|.

The operation of our device will be obvious from the foregoing description. Mention should be made of cam ||6 which is connected to connecting rods I6 and which bears on roller ||1 mounted on shaft ||8 and thereby supports and moves toggle-shaft I8 in a vertical direction.

We do not intend to be limited save as the scope of the prior art and of the attached claims may require.

We claim:

1. A power-driven toggle-operated press for perforated brick-shapes or the like comprising, a stationar frame supporting a mold-box thereon, an upper plunger and a lower plunger mounted for reciprocating movement into and out of said mold-box, toggles controlling the reciprocating movements of said plungers, piercers passing into said mold-box and through the material to be molded therein, a crosshead on which said piercers are mounted, side bars guided in said frame and supporting said crosshead, side bar arms attached to the said side bars and supporting V Fig. 1, 2, '1 and 8 show a bottom cross-head 21 them, a pivot-shaft carried by said frame and free for rotation relative to said frame and supporting said side bar arms, a cam lever connected to said pivot-shaft so as to rotate it, a cam-follower mounted on said sam lever, and a cam stressing said cam-follower and interconnected with said toggles to operate said piercers in timed relation with said upper and lower plungers.

2. A power-driven toggle-operated press for perforated brick-shapes or the like comprising, a stationary frame supporting a mold-box therein, an upper and a lower plunger mounted for reciprocating movement into and out of said moldbox and having a pressure face contacting the material being molded, toggles controlling the reciprocating movement of said plungers, piercers passing into said mold-box and through the material to be molded therein, one of said plungers having a hollow chamber therein of which the inlet is in the pressure face of the plunger and of which the outlet is spaced from the pressure face of said plunger and through which material pushed by said piercers may be extruded, a valve mounted on said last-mentioned plunger and controlling said opening to regulate the back-pressure on the material being extruded through said opening and out of said outlet, and means for moving said piercers in timed relation with said plungers.

3. A power-operated press for forming refractory shapes and the like comprising, a frame having a hollow mold-box therein, upper and lower plungers mounted for reciprocating movement into and out of said mold-box, piercers mounted for movement into and out of said moldbox and said upper plunger and through the material being molded in said mold-box, said upper plunger having an opening therethrough into which said piercers enter, a valve controlling said opening in said upper plunger, and means for operating said plungers and said piercers in co-ordinated relation.

4. A power-driven press for forming refractory shapes or the like comprising, a mold-box, relatively yvertically movable plungers cooperating with each other and with said mold-box, said plungers each having a pressure face contacting the material being molded and each having vertical walls, a piercer mounted for reciprocating movement into and out of said mold-box through the material being pressed in said mold-boX and into one of said plungers, said one of said plungers having a hollow interior constituting a passage formed by an inlet opening in its pressure face and leading to the hollow interior of said one plunger and leading thence to an outlet opening in a vertical wall of said one plunger and spaced from the pressure face thereof and communicating with the hollow interior of said one plunger, a guide in the hollow interior of said.

one plunger confronting said passage for directing extruded material towards said outlet opening, and means moving said plungers and said piercer in timed relation.

FRED M. MILLER. ALFRED C. SHAPE. HARRY S. WALKER. 

